#include<bits/stdc++.h>
using namespace std;
int main(){
	freopen("arena.in","r",stdin);
	freopen("arena.out","w",stdout);
	int n,m;
	cin>>n>>m;
	for(int i;i<=n;i++){
		int a,b;
		if(){
			
			}
		}
	return 0;
	}
